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          <h1>GNU General Public License</h1>
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  <blockquote class="fontsf">
    <p>Version 2, June 1991</p>

    <p>Copyright (C) 1989, 1991 <a href="http://www.gnu.org/" hreflang="en"
    rel="bookmark">Free Software Foundation</a>, Inc. 59 Temple Place - Suite
    330, Boston, MA 02111-1307, USA</p>

    <p>Everyone is permitted to copy and distribute verbatim copies of this
    license document, but changing it is not allowed.</p>
  </blockquote>
  <hr>

  <h2>Preamble</h2>

  <div class="indent">
    <p>The licenses for most software are designed to take away your freedom to
    share and change it. By contrast, the GNU General Public License is
    intended to guarantee your freedom to share and change free software--to
    make sure the software is free for all its users. This General Public
    License applies to most of the Free Software Foundation's software and to
    any other program whose authors commit to using it. (Some other Free
    Software Foundation software is covered by the GNU Library General Public
    License instead.) You can apply it to your programs, too.</p>

    <p>When we speak of free software, we are referring to freedom, not price.
    Our General Public Licenses are designed to make sure that you have the
    freedom to distribute copies of free software (and charge for this service
    if you wish), that you receive source code or can get it if you want it,
    that you can change the software or use pieces of it in new free programs;
    and that you know you can do these things.</p>

    <p>To protect your rights, we need to make restrictions that forbid anyone
    to deny you these rights or to ask you to surrender the rights. These
    restrictions translate to certain responsibilities for you if you
    distribute copies of the software, or if you modify it.</p>

    <p>For example, if you distribute copies of such a program, whether gratis
    or for a fee, you must give the recipients all the rights that you have.
    You must make sure that they, too, receive or can get the source code. And
    you must show them these terms so they know their rights.</p>

    <p>We protect your rights with two steps: (1) copyright the software, and
    (2) offer you this license which gives you legal permission to copy,
    distribute and/or modify the software.</p>

    <p>Also, for each author's protection and ours, we want to make certain
    that everyone understands that there is no warranty for this free software.
    If the software is modified by someone else and passed on, we want its
    recipients to know that what they have is not the original, so that any
    problems introduced by others will not reflect on the original authors'
    reputations.</p>

    <p>Finally, any free program is threatened constantly by software patents.
    We wish to avoid the danger that redistributors of a free program will
    individually obtain patent licenses, in effect making the program
    proprietary. To prevent this, we have made it clear that any patent must be
    licensed for everyone's free use or not licensed at all.</p>

    <p>The precise terms and conditions for copying, distribution and
    modification follow.</p>
  </div>

  <h2>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</h2>

  <div class="indent">
    <ol class="numericol">
      <li id="sect1">
        <p>This License applies to any program or other work which contains a
        notice placed by the copyright holder saying it may be distributed
        under the terms of this General Public License. The "Program", below,
        refers to any such program or work, and a "work based on the Program"
        means either the Program or any derivative work under copyright law:
        that is to say, a work containing the Program or a portion of it,
        either verbatim or with modifications and/or translated into another
        language. (Hereinafter, translation is included without limitation in
        the term "modification".) Each licensee is addressed as "you".</p>

        <p>Activities other than copying, distribution and modification are not
        covered by this License; they are outside its scope. The act of running
        the Program is not restricted, and the output from the Program is
        covered only if its contents constitute a work based on the Program
        (independent of having been made by running the Program). Whether that
        is true depends on what the Program does.</p>

        <p>You may copy and distribute verbatim copies of the Program's source
        code as you receive it, in any medium, provided that you conspicuously
        and appropriately publish on each copy an appropriate copyright notice
        and disclaimer of warranty; keep intact all the notices that refer to
        this License and to the absence of any warranty; and give any other
        recipients of the Program a copy of this License along with the
        Program.</p>

        <p>You may charge a fee for the physical act of transferring a copy,
        and you may at your option offer warranty protection in exchange for a
        fee.</p>
      </li>

      <li id="sect2">
        <p>You may modify your copy or copies of the Program or any portion of
        it, thus forming a work based on the Program, and copy and distribute
        such modifications or work under the terms of <a href="#sect1" rev=
        "section">Section 1</a> above, provided that you also meet all of these
        conditions:</p>

        <ol class="alphaol">
          <li id="sect2a">You must cause the modified files to carry prominent
          notices stating that you changed the files and the date of any
          change.</li>

          <li id="sect2b">You must cause any work that you distribute or
          publish, that in whole or in part contains or is derived from the
          Program or any part thereof, to be licensed as a whole at no charge
          to all third parties under the terms of this License.</li>

          <li id="sect2c">If the modified program normally reads commands
          interactively when run, you must cause it, when started running for
          such interactive use in the most ordinary way, to print or display an
          announcement including an appropriate copyright notice and a notice
          that there is no warranty (or else, saying that you provide a
          warranty) and that users may redistribute the program under these
          conditions, and telling the user how to view a copy of this License.
          (Exception: if the Program itself is interactive but does not
          normally print such an announcement, your work based on the Program
          is not required to print an announcement.)</li>
        </ol>

        <p>These requirements apply to the modified work as a whole. If
        identifiable sections of that work are not derived from the Program,
        and can be reasonably considered independent and separate works in
        themselves, then this License, and its terms, do not apply to those
        sections when you distribute them as separate works. But when you
        distribute the same sections as part of a whole which is a work based
        on the Program, the distribution of the whole must be on the terms of
        this License, whose permissions for other licensees extend to the
        entire whole, and thus to each and every part regardless of who wrote
        it.</p>

        <p>Thus, it is not the intent of this section to claim rights or
        contest your rights to work written entirely by you; rather, the intent
        is to exercise the right to control the distribution of derivative or
        collective works based on the Program.</p>

        <p>In addition, mere aggregation of another work not based on the
        Program with the Program (or with a work based on the Program) on a
        volume of a storage or distribution medium does not bring the other
        work under the scope of this License.</p>
      </li>

      <li id="sect3">
        <p>You may copy and distribute the Program (or a work based on it,
        under <a href="#sect2" rev="section">Section 2</a>) in object code or
        executable form under the terms of Sections <a href="#sect1" rev=
        "section">1</a> and <a href="#sect2" rev="section">2</a> above provided
        that you also do one of the following:</p>

        <ol class="alphaol">
          <li id="sect3a">Accompany it with the complete corresponding
          machine-readable source code, which must be distributed under the
          terms of Sections <a href="#sect1" rev="section">1</a> and <a href=
          "#sect2" rev="section">2</a> above on a medium customarily used for
          software interchange; or,</li>

          <li id="sect3b">Accompany it with a written offer, valid for at least
          three years, to give any third party, for a charge no more than your
          cost of physically performing source distribution, a complete
          machine-readable copy of the corresponding source code, to be
          distributed under the terms of Sections <a href="#sect1" rev=
          "section">1</a> and <a href="#sect2" rev="section">2</a> above on a
          medium customarily used for software interchange; or,</li>

          <li id="sect3c">Accompany it with the information you received as to
          the offer to distribute corresponding source code. (This alternative
          is allowed only for noncommercial distribution and only if you
          received the program in object code or executable form with such an
          offer, in accord with <a href="#sect3b" rev="subsection">Subsection
          b</a> above.)</li>
        </ol>

        <p>The source code for a work means the preferred form of the work for
        making modifications to it. For an executable work, complete source
        code means all the source code for all modules it contains, plus any
        associated interface definition files, plus the scripts used to control
        compilation and installation of the executable. However, as a special
        exception, the source code distributed need not include anything that
        is normally distributed (in either source or binary form) with the
        major components (compiler, kernel, and so on) of the operating system
        on which the executable runs, unless that component itself accompanies
        the executable.</p>

        <p>If distribution of executable or object code is made by offering
        access to copy from a designated place, then offering equivalent access
        to copy the source code from the same place counts as distribution of
        the source code, even though third parties are not compelled to copy
        the source along with the object code.</p>
      </li>

      <li id="sect4">
        <p>You may not copy, modify, sublicense, or distribute the Program
        except as expressly provided under this License. Any attempt otherwise
        to copy, modify, sublicense or distribute the Program is void, and will
        automatically terminate your rights under this License. However,
        parties who have received copies, or rights, from you under this
        License will not have their licenses terminated so long as such parties
        remain in full compliance.</p>
      </li>

      <li id="sect5">
        <p>You are not required to accept this License, since you have not
        signed it. However, nothing else grants you permission to modify or
        distribute the Program or its derivative works. These actions are
        prohibited by law if you do not accept this License. Therefore, by
        modifying or distributing the Program (or any work based on the
        Program), you indicate your acceptance of this License to do so, and
        all its terms and conditions for copying, distributing or modifying the
        Program or works based on it.</p>
      </li>

      <li id="sect6">
        <p>Each time you redistribute the Program (or any work based on the
        Program), the recipient automatically receives a license from the
        original licensor to copy, distribute or modify the Program subject to
        these terms and conditions. You may not impose any further restrictions
        on the recipients' exercise of the rights granted herein. You are not
        responsible for enforcing compliance by third parties to this
        License.</p>
      </li>

      <li id="sect7">
        <p>If, as a consequence of a court judgment or allegation of patent
        infringement or for any other reason (not limited to patent issues),
        conditions are imposed on you (whether by court order, agreement or
        otherwise) that contradict the conditions of this License, they do not
        excuse you from the conditions of this License. If you cannot
        distribute so as to satisfy simultaneously your obligations under this
        License and any other pertinent obligations, then as a consequence you
        may not distribute the Program at all. For example, if a patent license
        would not permit royalty-free redistribution of the Program by all
        those who receive copies directly or indirectly through you, then the
        only way you could satisfy both it and this License would be to refrain
        entirely from distribution of the Program.</p>

        <p>If any portion of this section is held invalid or unenforceable
        under any particular circumstance, the balance of the section is
        intended to apply and the section as a whole is intended to apply in
        other circumstances.</p>

        <p>It is not the purpose of this section to induce you to infringe any
        patents or other property right claims or to contest validity of any
        such claims; this section has the sole purpose of protecting the
        integrity of the free software distribution system, which is
        implemented by public license practices. Many people have made generous
        contributions to the wide range of software distributed through that
        system in reliance on consistent application of that system; it is up
        to the author/donor to decide if he or she is willing to distribute
        software through any other system and a licensee cannot impose that
        choice.</p>

        <p>This section is intended to make thoroughly clear what is believed
        to be a consequence of the rest of this License.</p>
      </li>

      <li id="sect8">
        <p>If the distribution and/or use of the Program is restricted in
        certain countries either by patents or by copyrighted interfaces, the
        original copyright holder who places the Program under this License may
        add an explicit geographical distribution limitation excluding those
        countries, so that distribution is permitted only in or among countries
        not thus excluded. In such case, this License incorporates the
        limitation as if written in the body of this License.</p>
      </li>

      <li id="sect9">
        <p>The Free Software Foundation may publish revised and/or new versions
        of the General Public License from time to time. Such new versions will
        be similar in spirit to the present version, but may differ in detail
        to address new problems or concerns.</p>

        <p>Each version is given a distinguishing version number. If the
        Program specifies a version number of this License which applies to it
        and "any later version", you have the option of following the terms and
        conditions either of that version or of any later version published by
        the Free Software Foundation. If the Program does not specify a version
        number of this License, you may choose any version ever published by
        the Free Software Foundation.</p>
      </li>

      <li id="sect10">
        <p>If you wish to incorporate parts of the Program into other free
        programs whose distribution conditions are different, write to the
        author to ask for permission. For software which is copyrighted by the
        Free Software Foundation, write to the Free Software Foundation; we
        sometimes make exceptions for this. Our decision will be guided by the
        two goals of preserving the free status of all derivatives of our free
        software and of promoting the sharing and reuse of software
        generally.</p>
      </li>

      <li id="sect11">
        <p>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
        FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
        OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
        PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
        EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
        ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
        YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
        NECESSARY SERVICING, REPAIR OR CORRECTION.</p>
      </li>

      <li id="sect12">
        <p>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
        WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
        AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
        FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
        CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
        PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
        RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
        FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
        SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
        DAMAGES.</p>
      </li>
    </ol>
  </div>

  <h2>END OF TERMS AND CONDITIONS</h2>
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